1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23832-2 SANS 18752:2009Edition 1ISO 18752:2006Edition 1SOUTH AFRICAN NATIONAL STANDARD Rubber hoses and hose assemblies Wire- or textile-r
4、einforced single-pressure types for hydraulic applications Specification This national standard is the identical implementation of ISO 18752:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloo
5、f Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 18752:2009 Edition 1 ISO 18752:2006 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 45, Rubber and rubber produ
6、cts, in accordance with the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in December 2009. Reference numberISO 18752:2006(E)ISO 2006INTERNATIONAL STANDARD ISO18752First edition2006-07-15Rubber hoses and hose assemblies Wire- or textil
7、e-reinforced single-pressure types for hydraulic applications Specification Tuyaux et flexibles en caoutchouc Types hydrauliques avec armature de fils mtalliques tresss Spcifications SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SA
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11、ss given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs
12、member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reservedSANS 18752:2009This s tandard may only be used and printed
13、by approved subscription and freemailing clients of the SABS .ISO 18752:2006(E) ISO 2006 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Classification2 4.1 Classes .2 4.2 Grades and types.3 5 Materials and construction.4 5.1 Hoses 4 5
14、.2 Hose assemblies4 6 Dimensions and tolerances 4 6.1 Diameters4 6.2 Cover thickness .6 6.3 Concentricity6 7 Physical properties7 7.1 Fluid resistance of rubber compounds .7 7.1.1 Test pieces .7 7.1.2 Oil resistance .7 7.2 Performance requirements .7 7.2.1 Hydrostatic requirements .7 7.2.2 Change in
15、 length7 7.2.3 Minimum bend radius7 7.2.4 Resistance to impulse.9 7.2.5 Leakage of hose assemblies 9 7.2.6 Cold flexibility 9 7.2.7 Adhesion between components.9 7.2.8 Vacuum resistance 9 7.2.9 Abrasion resistance 10 7.2.10 Ozone resistance .10 8 Frequency of testing .10 9 Marking .10 9.1 Hoses 10 9
16、.2 Hose assemblies11 10 Recommendations for packaging and storage 11 11 Test report 11 Annex A (normative) Type tests and routine tests 12 Annex B (informative) Production acceptance tests .13 Annex C (informative) Recommendations for lengths of supplied hoses and tolerances on lengths of hose assem
17、blies14 Annex D (informative) Information to be provided by hose manufacturer15 Bibliography 16 SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 18752:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Or
18、ganization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been establ
19、ished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizati
20、on. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
21、 Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such pa
22、tent rights. ISO 18752 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 18752:
23、2006(E) ISO 2006 All rights reserved 1Rubber hoses and hose assemblies Wire- or textile-reinforced single-pressure types for hydraulic applications Specification 1 Scope This International Standard specifies requirements for nine classes, four grades and seven types of wire- or textile-reinforced hy
24、draulic hoses and hose assemblies of nominal sizes ranging from 5 to 102. Each class has a single maximum working pressure for all sizes. Such hoses are suitable for use with hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743-4 at temperatures ranging from 40 C to + 100 C for types AS, AC
25、, BS and BC and 40 C to + 120 C for types CS, CC and DC. This International Standard does not include requirements for the connection ends. It is limited to the performance of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest maximum working pressure of
26、the components. NOTE It is the responsibility of the user, in consultation with the hose manufacturer, to establish the compatibility of the hose with the fluid to be used. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated ref
27、erences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO 1746, Rubber or plastics hoses and tubing Bending tests ISO 1817, Rubber,
28、 vulcanized Determination of the effect of liquids ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of dimensions ISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexibility tests ISO 6803, Rubber or plastics hoses and hose assemblies Hydraulic-pressure
29、 impulse test without flexing ISO 6945, Rubber hoses Determination of abrasion resistance of the outer cover ISO 7233, Rubber and plastics hoses and hose assemblies Determination of resistance to vacuum ISO 7326:1991, Rubber and plastics hoses Assessment of ozone resistance under static conditions I
30、SO 8033:2006, Rubber and plastics hoses Determination of adhesion between components ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary ISO 8331, Rubber and plastics hoses and hose assemblies Guidelines for selection, storage, use and maintenance SANS 18752:2009This s tandard may onl
31、y be used and printed by approved subscription and freemailing clients of the SABS .ISO 18752:2006(E) 2 ISO 2006 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 apply. 4 Classification 4.1 Classes Nine classes of hose are spec
32、ified, distinguished by their maximum working pressure, as shown in Table 1. Each class may be manufactured in up to 14 nominal sizes. Table 1 Classes and nominal sizes Class 35 70 140 210 250 280 350 420 560 MWPa(bar) 35 70 140 210 250 280 350 420 560 MWPa(MPa) 3,5 7 14 21 25 28 35 42 56 Nominal si
33、ze 5 X X X X X X X X N/A 6,3 X X X X X X X X N/A 8 X X X X X X X X N/A 10 X X X X X X X X N/A 12,5 X X X X X X X X N/A 16 X X X X X X X X X 19 X X X X X X X X X 25 X X X X X X X X X 31,5 X X X X X X X X X 38 X X X X X X X X N/A 51 X X X X X X X X N/A 63 X X X N/A N/A N/A N/A N/A N/A 76 X X X N/A N/A
34、 N/A N/A N/A N/A 102 X N/A N/A N/A N/A N/A N/A N/A N/A NOTE X = Applicable; N/A = Not applicable. aMaximum working pressure. SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 18752:2006(E) ISO 2006 All rights reserved 34.2 Gr
35、ades and types Hoses are classified according to their resistance to impulse into four grades: A, B, C and D. Each grade is classified by outside diameter into standard types (AS, BS and CS) and compact types (AC, BC, CC and DC), as shown in Table 2. Table 2 Grades and types Resistance to impulse Gr
36、ade TypeaTemperature C Impulse pressure (% of MWPb) Minimum number of cycles AS A AC 100 133 % 200 000 BS B BC 100 133 % 500 000 CS C CC 120 133 % and 120 %c500 000 D DC 120 133 % 1 000 000 aStandard or compact, e.g. CS is grade C and standard type. As shown in Table 4 and Table 8, standard types ha
37、ve larger outside diameters and larger bend radii and compact types have smaller outside diameters and smaller bend radii. bMaximum working pressure. c120 % of the MWP shall be used for classes 350, 420 and 560 instead of 133 %. Each class includes one of each type or both as shown in Table 3. Table
38、 3 Type and maximum working pressure Class 35 70 140 210 250 280 350 420 560 MWPa(bar) 35 70 140 210 250 280 350 420 560 MWPa(MPa) 3,5 7 14 21 25 28 35 42 56 Grade Type AS X X X X X X X X N/A A AC X X X X X X X X N/A BS X X X X X X X X N/A B BC X X X X X X X X N/A CS N/A N/A N/A X X X X X N/A C CC N
39、/A N/A N/A X X X X N/A X D DC N/A N/A N/A X X X X N/A N/A NOTE X = Applicable; N/A = Not applicable. aMaximum working pressure. SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 18752:2006(E) 4 ISO 2006 All rights reserved5 M
40、aterials and construction 5.1 Hoses Hoses shall consist of a hydraulic-fluid-resistant rubber lining, one or multiple layers of steel wire or textile and an oil-, abrasion- and weather-resistant rubber cover. A layer of other materials on the rubber cover is allowed for improved resistance to abrasi
41、on or other. 5.2 Hose assemblies Hose assemblies shall only be manufactured using hose fittings which conform to the requirements of 7.2.1, 7.2.4 and 7.2.5 of this International Standard. Follow the manufacturers instructions for the proper preparation and fabrication of hose assemblies. 6 Dimension
42、s and tolerances 6.1 Diameters When measured in accordance with ISO 4671, the diameters of hoses shall conform to the values given in Table 4. SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .Table 4 Diameters ofhoses Inside dia
43、meter(all classes)Maximum outside diameterof hose mmmm Class 35Class 70Class 140Class 210Class 250Class 280Class 350Class 420Class 560Nom-inal sizemin. max.Stan-dard Com-pact Stan-dard Com-pact Stan-dard Com-pact Stan-dard Com-pact Stan-dard Com-pact Stan-dard Com-pact Stan-dard Com-pact Stan-dard C
44、om-pact Stan-dard Com-pact 5 6,3 8 10 12,5 16 19 25 31,5 38 51 63 76 102 4,6 6,1 7,7 9,3 12,3 15,5 18,6 25,0 31,4 37,7 50,4 63,1 74,6 100,0 5,4 7,0 8,5 10,1 13,5 16,7 19,8 26,4 33,0 39,3 52,0 65,1 77,8 103,2 14 17 19 21 24 27 31 40 53 59 72 84 100 130 11 14 15 17 21 25 28 36 45 56 69 14 17 19 21 24
45、27 31 40 53 59 72 84 100 11 14 15 18 22 25 29 38 45 56 69 14 17 19 21 24 29 33 41 54 59 73 84 100 11 14 15 17 22 25 29 38 49 56 70 14 17 19 23 26 29 33 41 53 59 72 11 14 16 19 22 26 31 39 49 56 70 17 19 20 23 26 29 34 41 54 59 73 15 15 16 19 22 27 32 39 49 56 70 17 19 20 23 26 29 34 41 54 59 73 15 1
46、5 16 19 23 27 32 39 49 56 70 17 19 20 23 27 29 38 50 54 60 75 15 15 16 21 25 28 36 45 52 59 73 17 19 20 24 27 37 50 54 60 75 80 15 15 30 36 45 52 ISO 18752:2006(E) ISO 2006 All rights reserved 5SANS 18752:2009This s tandard may only be used and printed by approved subscription and freemailing client
47、s of the SABS .ISO 18752:2006(E) 6 ISO 2006 All rights reserved6.2 Cover thickness When measured in accordance with ISO 4671, the outer cover thickness of hoses shall conform to the values given in Table 5. Standard types may be produced with either thick or thin covers, the tolerance limits for thi
48、n-cover standard types being the same as the tolerance limits for compact types. Table 5 Cover thickness Cover thickness mm Standard (thick cover) Standard (thin cover) Compact Nominal size min. max. min. max. min. max. 5 6,3 8 10 12,5 16 19 25 31,5 38 51 63 76 102 1,5 1,5 1,5 1,5 1,5 1,5 1,5 1,5 1,
49、8 1,8 1,8 1,8 1,8 1,8 3,2 3,2 3,2 3,2 3,2 3,2 3,2 4,6 4,6 4,6 4,6 5,0 5,0 5,0 0,8 0,8 0,8 0,8 0,8 0,8 0,8 1,0 1,0 1,3 1,3 1,5 1,5 1,5 1,5 1,5 1,5 1,5 2,0 2,0 2,5 2,5 0,8 0,8 0,8 0,8 0,8 0,8 0,8 1,0 1,0 1,3 1,3 1,5 1,5 1,5 1,5 1,5 1,5 1,5 2,0 2,0 2,5 2,5 6.3 Concentricity When measured in accordance with ISO
